Plasterer&#39;s corner-bead setter



June24,1930. l H. RWILCOX 1,767,335

PLASTERERS CORNER BEAD SETTER I Filed Jan. 5, 1928 3nv'entor HOMERR.wu..cox

' Qttomegs Fat ented June 24, 1930 UNITED STATES *HOMERR. wILoox, or w gcrr z', orrro PLASTERERS CORNER-BEA!) SETTER Application filed January5,1928. Serial a... 244,607.

To neatly plaster a projecting vertical cor ner requires a very. skilledworkman, much time and great care. If a vertical projecting corner isnot accurately plastered espe wall paper. To make the job of plasteringeasier there has been invented the now widely used corner beadconsisting of a strip ofsheet metal bent longitudinally in troughfashion perforated in the webs or wings and having a bead longitudinallyat the corner. The corner bead is fitted at the corner of meeting wallsto be plastered, the bead proper serving to fix in advance the limits ofthe plastering on the two walls. But this expedient gave rise to the newproblem of preliminarily fixing the cornerbead so that it might stand inan accurately vertical position. The use of plumb line was commonlyresorted to but success in securing verticality is rare because the linenecessarily stands away from the intended corner and the 'eye wasultimately relied on. The use of the plumb line also consumes- A numberof devices have been much time.

proposed or patented for positioning the corner bead, hence the objectof my invention is to provide an improved tool by means of whichdistortion or defects in the corner bead 3 canbe first detected and thebead discarded or straightened and then quickly and accurately setwithout a high degree of skill on the part of the setter.

The inventionis embodied in the example herein shown and described, thefeatures of novelty being finally claimed.

' In the accompanying drawing-- 7 Figure 'l is a view in rear elevationshow ing the invention-applied to a cornerbead.

Fig. 2 is a plan view looking at the upper end thereof on a larger scalethan appears in Fig. 1. v

Fig. 3'is a rear View of fractions taken from near the middle of theholder showing details.

Fig. 4 is a top plan view of the upper end of the device showing addedto the gripping members means for latching said members in such relationto each other that the device may be used as a straight edge.

In the views 5, 5, designate the-bodies of the .latchin latchingposition until intentionv the gripping members, said bodies being con-.veniently' formed'of long'pieces of wood or metal having theirforwardedges mainly straight" and fiat andtheir rear portions formed forconvenient manipulation. The flat portions of the forwardedges can'beeach lined with a stripof'brassas at 6, 6 if the gripping bodies be madeof wood. 7

The forward edges of the gripper bodies are connected by a suitablenumber of hinges, v the leaves of which are indicated at 7 7 and thepintle at 8. Around the pintle of each hinge is secured a coil spring 9,under tension, the extended ends of which press against the hinge leaveswith a tendency to throw the body parts toward a common plane. Theforward adjacent corners of the bodies are grooved or out out, as bestshown at 10, 10, a Fig. 4, to fitv on the beaded portion 11 of thecorner bead and firmly grip them in prac- .7 0 tice as best shown inFig. 2." 7

7 Each of the body portions, 5, 5, is provided near its middle with aspirit-level glass 12'. set in opening 13 and ata right angle to a lineof the forward" edge of the body so that when, ,75 as hereinafterdescribed, both said vedges are i Vertical the bubble of the glass willappear at the middle of the glass thus insuring that the cornerbead heldby the gripping member is in substantially vertical position. The 8.9

fact that the bubble of one of the gripping bodies when holding a cornerbead appears in the middle of'its glass would notbe evidence that bothforward edges are in vertical position, hence these glasses cooperatewith each otherin indicating proper verticality for the corner beadcontained in the instrument.

The character 14: designates a hook on the rearedge of one of thegripper bodies and V 15 a headed pin on the other to be engaged bythehook to latch. the gripper bodies in position as shownin Fig. 4' so thatthe tool can be used asa straightedge, its forward edge or edges servingin an obvious manner for this purpose. 'The pressure of the springs ofthe hinges being, as heretofore pointedout, to cause the bars to tend togo 7 toward a common plane will aid in holding ally removed.

i "iv In practice the corner bead will be placed tire lengths, springmeans tending to hold in the instrument as shown in Figs. 1 and 2 saidbars in corner bead gripping position, and the inner angle of the beadsupplied with and means for latching said bars with their a suitablecoating of plaster of Paris forward faces in substantially the samelane.

promptly after which the corner bead, While still in the instrument,will be applied to the corner of the two walls to be plastered. In doingthis due reference will be made by the workman to the two bubbles andproper adjustment of the instrument will be made by,

him to make sure that the corner bead is set in vertical position. Theplaster of Paris upon hardening fixes the corner bead in position butsuch fixing can be aided by a nail or two at thetop and bottom driventhrough 7 holes in the corner bead. An advantage of theconstruction isthat because the forward faces of the corner bead setter contact withthe flanges as well as the intermediate bead any defects in the cornerbead are detected, and is discarded or its defects rectified beforeapplication to the corner. 7

The forms of the parts can be changed without departing from the gist ofthe invention as claimed.

WVhat I claim is:

1. An instrument for setting a plasterers corner bead including a pairof substantially continuous bars having flat forward faces, said barshinged togetherlongitudinally at adjacent corners and adapted at saidfaces to grip the corner bead, including the flanges thereof throughoutsubstantially their entire lengths, and spring means tending to holdsaid bars in corner bead grippingposition.

'2. An instrument for setting a plasterers corner bead including a pairof substantially continuous bars having flat forward inwardly beveledfaces, said bars hinged together longitudinally at adjacent corners,said corners provided with grooves, and said bars adapted at said facesto grip the corner bead, including the flanges thereof throughoutsubstantially their entire lengths, and spring means tending to holdsaid bars in corner bead gripping position.

3. An instrument for setting a plasterers corner bead including a pairof substantially continuous ba'rs having flat forward inwardly beveledfaces, said bars hinged together longitudinally at adjacent corners andadapted at said faces to grip the corner bead, including the flangesthereof throughout substantially their entire lengths, spring meanstending to hold said bars in corner bead gripping position, and meansfor latching said bars with their forward faces in substantially thesame plane.

4. An instrument for setting a plasterers corner bead including a pairof substantially continuous bars having fiat forward faces, said barshinged together longitudinally at adjacent corners and adapted at saidfaces 7 to grip the corner bead, including the flanges thereofthroughout substantially their en- HOMER R. NILC X.

